Remove URLRequest::Restart() because it is only referenced by unit tests

net/url_request/url_request.h

 // Copyright (c) 2006-2009 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #ifndef NET_URL_REQUEST_URL_REQUEST_H_
 #define NET_URL_REQUEST_URL_REQUEST_H_
 
 #include <map>
 #include <string>
 #include <vector>
@@ skipping 499 matching lines @@
   // successful, otherwise an error code is returned.
   int Redirect(const GURL& location, int http_status_code);
 
   // Called by URLRequestJob to allow interception when a redirect occurs.
   void ReceivedRedirect(const GURL& location, bool* defer_redirect);
 
   // Called by URLRequestJob to allow interception when the final response
   // occurs.
   void ResponseStarted();
 
-  // Allow an interceptor's URLRequestJob to restart this request.
-  // Should only be called if the original job has not started a resposne.
-  void Restart();
-
  private:
   friend class URLRequestJob;
 
   void StartJob(URLRequestJob* job);
 
   // Restarting involves replacing the current job with a new one such as what
   // happens when following a HTTP redirect.
   void RestartWithJob(URLRequestJob *job);
   void PrepareToRestart();
 
@@ skipping 91 matching lines @@
 #define URLREQUEST_COUNT_DTOR() url_request_metrics.object_count--
 
 #else  // disable leak checking in release builds...
 
 #define URLREQUEST_COUNT_CTOR()
 #define URLREQUEST_COUNT_DTOR()
 
 #endif  // #ifndef NDEBUG
 
 #endif  // NET_URL_REQUEST_URL_REQUEST_H_